You can move back within text without deleting; hold down the ALT key (lower left hand corner of the keyboard) and use the trackwheel. You can use it well. You just need to learn the tricks and tips how
Read the Tips and Tricks FAQs that are posted here - they have really good information.
Check out programs called BBToday or PocketDay. They give you a "Today" like view (tasks, calendar, unread messages) on one screen.